What's the fastest and / or craziest way to model an arrow in Blender?
So I thought to myself: These answers are so amazing, but they're hard. Even I have trouble recreating them. I have to do something. I need to provide a simple and effortless answer and after a while, I found it.

Step 1: Create a seven sided Cylinder.



Step 2: Build this ordinary and straightforward armature (shouldn't take long) and connect it to the circle.



Step 3: Push the Bone that has the shape of a modeled arrow (khm) up a bit.



I mean, it doesn't get much easier than pushing a bone up a bit.

To explain:

The orange and red ones are simple 2 bone IK-chains pointing to the mover arrow.

The green ones are parented to the orange ones and move with them. They are not necessary but it's a bit clearer that way. You could parent dark blue directly to orange with offset.

Dark blue is parented to green.

The blue ones are again simple 2 bone IK chains pointing to the light blue targets.

The yellow circle bones sit in the middle of the dark blue bones and are the only ones having deform enabled.

The tricky bit is to find the right lengths for red and orange so that a single bone moves all the green bones just the right amount.

James Watt has discovered this green/dark blue/light blue lever for his steam engines. It's called Watt's linkage. It enables the yellow circles to move pretty much in a straight line. It's still used in trains to keep the wheels from moving back and forth.

The orientation and length of the blue bones isn't just random. I simply put the tips on the arrow verts and the roots on the circle verts. Then I duplicated and rotated them 90 degrees to get the linkage with it's required right angles. Yes, simple rotation of a bone with start and end on a circle would have been enough, but meh...